Meeting Future Information Needs for Great Lakes Fisheries Management

1987 ◽  
Vol 44 (S2) ◽  
pp. s439-s447 ◽  
Author(s):  
W. J. Christie ◽  
John J. Collins ◽  
Gary W. Eck ◽  
Chris I. Goddard ◽  
John M. Hoenig ◽  
...  
Keyword(s):  
Great Lakes ◽  
Fisheries Management ◽  
Information Needs ◽  
Temporal Trends ◽  
Analytical Techniques ◽  
Periodic Review ◽  
Adequate Funding ◽  
Term Basis ◽  
Data Design

Description of information needs for management of Great Lakes fisheries is complicated by recent changes in biology and management of the Great Lakes, development of new analytical methodologies, and a transition in management from a traditional unispecies approach to a multispecies/community approach. A number of general problems with the collection and management of data and information for fisheries management need to be addressed (i.e. spatial resolution, reliability, computerization and accessibility of data, design of sampling programs, standardization and coordination among agencies, and the need for periodic review of procedures). Problems with existing data collection programs include size selectivity and temporal trends in the efficiency of fishing gear, inadequate creel survey programs, bias in age estimation, lack of detailed sea lamprey (Petromyzon marinus) wounding data, and data requirements for analytical techniques that are underutilized by managers of Great Lakes fisheries. The transition to multispecies and community approaches to fisheries management will require policy decisions by the management agencies, adequate funding, and a commitment to develop programs for collection of appropriate data on a long-term basis.

Great Lakes Environmental Protection Policies from a Fisheries Perspective

1980 ◽  
Vol 37 (7) ◽  
pp. 1196-1204 ◽  
Author(s):  
M. G. Johnson
Keyword(s):  
Great Lakes ◽  
Environmental Protection ◽  
Fisheries Management ◽  
Policy Development ◽  
Pollution Abatement ◽  
Resources Management ◽  
Fisheries Resources ◽  
International Joint Commission ◽  
Environmental Protection Policies

International policies in environmental protection and resources management in the Great Lakes have evolved in three fields: water quantity and quality management, fisheries management, and air pollution abatement. The general segregation of policy development ignores the complex interplay among air, water, and fisheries resources and the potential to direct wastes to selected receptors. Approaches to environmental and resources management do not deal effectively with root causes in a sufficiently broad context. Socioeconomic information is not used effectively either as yardsticks of environmental quality or as compelling arguments for remedial programs. New approaches are needed toward resources management cum environmental policy, with emphasis on participatory planning across resource sectors to optimize a diversity of long-term benefits to society. Strong political leadership is required to depolarize jurisdictional and bureaucratic empires. The International Joint Commission and Great Lakes Fishery Commission should collaborate to help in identification of issues and root causes, to encourage strategic planning with resource sector and public participation, and to take a broad overview of societal goals and public policy in relation to recognized finite capacity of the Great Lakes ecosystem to maintain quality of life as a long-term premise.Key words: ecosystems, resource management, fisheries management, environmental legislation, international cooperation, international agreements, sociological aspects

Declining lake trout (Salvelinus namaycush) energy density: are there too many salmonid predators in the Great Lakes?

2009 ◽  
Vol 66 (6) ◽  
pp. 919-932 ◽  
Author(s):  
Gordon Paterson ◽  
D. Michael Whittle ◽  
Kenneth G. Drouillard ◽  
G. Douglas Haffner
Keyword(s):  
Energy Density ◽  
Great Lakes ◽  
Body Mass ◽  
Lake Trout ◽  
Growth Models ◽  
Temporal Trends ◽  
Salvelinus Namaycush ◽  
Average Body Mass ◽  
Native Salmonids

This study used long-term biomonitoring data on lake trout ( Salvelinus namaycush ) collected from Lakes Erie, Ontario, Huron, and Superior between 1995 and 2004 to investigate latitudinal and temporal trends in body mass and energy density of this top predator in the Great Lakes. Lake trout average body mass and energy density were observed to have negative relationships with latitude that primarily reflected patterns in lake productivities. Temporal declines in energy density occurred for >80% of all lake trout age classes collected from each of the four lakes between 1995 and 2004. von Bertalanffy (VBL) growth models describing the relationships between fish energy density and age demonstrated decreased growth of lake trout energy density during 2000–2004 relative to 1995–1999. VBL growth coefficients (k) and the slopes describing the rates of change in lake trout energy density were negatively correlated with the total number of lake trout and salmonid individuals released into these lakes during this study. We hypothesize that the temporal declines in lake trout body mass and energy density are a manifestation of a bioenergetic bottleneck for this species due to their inability to efficiently compete with non-native salmonids for depleted prey populations.

Concentrations and Long-Term Temporal Trends of Hexabromocyclododecanes (HBCDD) in Lake Trout and Walleye from the Great Lakes

2020 ◽  
Vol 54 (10) ◽  
pp. 6134-6141 ◽  
Author(s):  
Bita Alipour Parvizian ◽  
Chuanlong Zhou ◽  
Sujan Fernando ◽  
Bernard S. Crimmins ◽  
Philip K. Hopke ◽  
...  
Keyword(s):  
Great Lakes ◽  
Lake Trout ◽  
Temporal Trends

Spatial distributions and temporal trends in pollutants in the Great Lakes 1968–2008

2011 ◽  
Vol 46 (4) ◽  
pp. 269-289 ◽  
Author(s):  
Debbie Burniston ◽  
Paul Klawunn ◽  
Sean Backus ◽  
Brad Hill ◽  
Alice Dove ◽  
...  
Keyword(s):  
Surface Water ◽  
Great Lakes ◽  
Temporal Trends ◽  
Spatial Distributions ◽  
Niagara River ◽  
Management Actions ◽  
Time Period ◽  
Polybrominated Diphenylethers ◽  
Environmental Compartments

The Great Lakes have been the focus of intensive long-term research and monitoring programmes for the past 40 years. Spatial distributions and temporal trends have been determined for a range of environmental compartments, including surface water, sediment and fish. In general, there have been dramatic reductions in contamination by legacy pollutants including polychlorinated biphenyls (PCBs), organochlorine pesticides and metals. Concentrations of PCBs and lead in surface water at the mouth of the Niagara River have decreased by 58 and 54%, respectively, over the period 1986–2007. Correspondingly, concentrations of PCBs and lead in offshore sediments of Lake Ontario have decreased by 37 and 45%, respectively, since peak accumulations in the 1970s. Temporal trends for more modern chemicals, including polybrominated diphenylethers and perfluoroalkyl compounds, showed increases up until 2000 when management actions and heightened stakeholder awareness resulted in a levelling off or decline in the subsequent time period. While legacy issues are largely associated with areas of historical industrial activity, the presence of newer chemicals is generally associated with modern urban/industrial areas that act as diffuse sources.

Subsistence Use of Fisheries Resources in Alaska: Implications for Great Lakes Fisheries Management

1987 ◽  
Vol 116 (3) ◽  
pp. 510-518 ◽  
Author(s):  
Robert M. Muth ◽  
David E. Ruppert ◽  
Ronald J. Glass
Keyword(s):  
Great Lakes ◽  
Fisheries Management ◽  
Fisheries Resources

Socioeconomic Challenges faced by Basin’s People in India

Think India ◽  
2019 ◽  
Vol 22 (2) ◽  
pp. 296-304
Author(s):  
Biplab Tripathy ◽  
Tanmoy Mondal
Keyword(s):  
River Basin ◽  
High Tide ◽  
North East ◽  
The People ◽  
Term Basis ◽  
Major River ◽  
River Ganga ◽  
Basin Region ◽  
Basin Area

India is a subcontinent, there huge no of people lived in river basin area. In India there more or less 80% of people directly or indirectly depend on River. Ganga, Brahamputra in North and North East and Mahanadi, Govabori, Krishna, Kaveri, Narmoda, Tapti, Mahi in South are the major river basin in India. There each year due to flood and high tide lots of people are suffered in river basin region in India. These problems destroy the socio economic peace and hope of the people in river basin. There peoples are continuously suffered by lots of difficulties in sort or in long term basis. Few basin regions are always in high alert at the time of monsoon seasons. Sometime due to over migration from basin area, it becomes empty and creates an ultimate loss of resources in India and causes a dis-balance situation in this area.

Recent advances in the analysis full/empty capsid ratio and genome integrity of adeno-associated virus (AAV) gene delivery vectors

2020 ◽  
Vol 20 ◽  
Author(s):  
L. Hajba ◽  
A. Guttman
Keyword(s):  
Gene Delivery ◽  
High Efficiency ◽  
Analytical Techniques ◽  
Viral Gene ◽  
Adeno Associated Virus ◽  
Gene Delivery Vectors ◽  
Empty Capsid ◽  
Purification Methods ◽  
Viral Gene Delivery

: Adeno-associated virus (AAV) is one of the most promising viral gene delivery vectors with long-term gene expression and disease correction featuring high efficiency and excellent safety in human clinical trials. During the production of AAV vectors,there are several quality control (QC)parameters that should be rigorously monitored to comply with clini-cal safety and efficacy. This review gives a short summary of the most frequently used AVV production and purification methods,focusing on the analytical techniques applied to determine the full/empty capsid ratio and the integrity of the encapsidated therapeutic DNA of the products.

A Review on Recent Trends in Nanomaterials and Nanocomposites for Environmental Applications

2020 ◽  
Vol 16 ◽  
Author(s):  
Kannappan Panchamoorthy Gopinath ◽  
Malolan Rajagopal ◽  
Abhishek Krishnan ◽  
Shweta Kolathur Sreerama
Keyword(s):  
Environmental Pollution ◽  
Environmental Remediation ◽  
Carbon Capture ◽  
Potential Applications ◽  
Important Challenge ◽  
Term Basis ◽  
Short And Long Term ◽  
Recent Trends ◽  
Water And Soil Pollution

Background: Depletion and contamination of environmental resources such as water, air and soil caused by human activities is an increasingly important challenge faced around the world. The consequences of environmental pollution are felt acutely by all living beings, both on a short and long-term basis, thereby making methods of remediation of environmental pollution an urgent requirement. Objectives: The objective of this review is to dissect the complications caused by environmental degradation, highlight advancements in the field of nanotechnology and to scrutinize its applications in environmental remediation. Furthermore, the review aims to concisely explain the merits and drawbacks of nanotechnology compared to existing methods. Conclusion: The current and potential applications of nanomaterials and nanocomposites in the prevention, control and reduction of air, water and soil pollution and the mechanisms involved have been elucidated, as have their various merits and demerits. The applications of nanotechnology in the fields of carbon capture and agriculture have also received attention in this review.

scholarly journals Linking population size structure, heat stress and bleaching responses in a subtropical endemic coral

Coral Reefs ◽  
2021 ◽  
Author(s):  
Liam Lachs ◽  
Brigitte Sommer ◽  
James Cant ◽  
Jessica M. Hodge ◽  
Hamish A. Malcolm ◽  
...  
Keyword(s):  
Heat Stress ◽  
Size Structure ◽  
Temporal Trends ◽  
Early Recovery ◽  
Size Frequency Distribution ◽  
Frequency Distributions ◽  
Community Organisation ◽  
Size Frequency ◽  
Eastern Australia

AbstractAnthropocene coral reefs are faced with increasingly severe marine heatwaves and mass coral bleaching mortality events. The ensuing demographic changes to coral assemblages can have long-term impacts on reef community organisation. Thus, understanding the dynamics of subtropical scleractinian coral populations is essential to predict their recovery or extinction post-disturbance. Here we present a 10-yr demographic assessment of a subtropical endemic coral, Pocillopora aliciae (Schmidt-Roach et al. in Zootaxa 3626:576–582, 2013) from the Solitary Islands Marine Park, eastern Australia, paired with long-term temperature records. These coral populations are regularly affected by storms, undergo seasonal thermal variability, and are increasingly impacted by severe marine heatwaves. We examined the demographic processes governing the persistence of these populations using inference from size-frequency distributions based on log-transformed planar area measurements of 7196 coral colonies. Specifically, the size-frequency distribution mean, coefficient of variation, skewness, kurtosis, and coral density were applied to describe population dynamics. Generalised Linear Mixed Effects Models were used to determine temporal trends and test demographic responses to heat stress. Temporal variation in size-frequency distributions revealed various population processes, from recruitment pulses and cohort growth, to bleaching impacts and temperature dependencies. Sporadic recruitment pulses likely support population persistence, illustrated in 2010 by strong positively skewed size-frequency distributions and the highest density of juvenile corals measured during the study. Increasing mean colony size over the following 6 yr indicates further cohort growth of these recruits. Severe heat stress in 2016 resulted in mass bleaching mortality and a 51% decline in coral density. Moderate heat stress in the following years was associated with suppressed P. aliciae recruitment and a lack of early recovery, marked by an exponential decrease of juvenile density (i.e. recruitment) with increasing heat stress. Here, population reliance on sporadic recruitment and susceptibility to heat stress underpin the vulnerability of subtropical coral assemblages to climate change.

scholarly journals Studies of insect temporal trends must account for the complex sampling histories inherent to many long-term monitoring efforts

2021 ◽  
Author(s):  
Ellen A. R. Welti ◽  
Anthony Joern ◽  
Aaron M. Ellison ◽  
David C. Lightfoot ◽  
Sydne Record ◽  
...  
Keyword(s):  
Temporal Trends ◽  
Complex Sampling ◽  
Long Term Monitoring ◽  
Term Monitoring
Sign in / Sign up

Export Citation Format

Share Document